fr=open("C:/test.txt/魔女.txt","r",encoding="UTF-8")
fw=open("C:/test.txt/魔女.txt.bak","w",encoding="UTF-8")
for line in fr:
    line=line.strip()
    if line.split("\n")[0]=="「あの…！」":
        continue
    fw.write(f"{line}")
    fw.write("\n")
fr.close()
fw.close()